#coding=utf-8
import pygame.font
from pygame.sprite import Group
from ship import Ship
import pygame


class Scoreboard:
    '''显示得分信息的类'''
    def __init__(self, setting, screen, stats, path):
        '''初始化显示得分涉及的属性'''
        self.screen = screen
        self.screen_rect = screen.get_rect()
        self.setting = setting
        self.stats = stats
        self.path = path

        #显示得分信息时用的字体设置
        self.text_color = (30, 30, 30)
        self.font = pygame.font.SysFont(None, 48)

        #准备初始得分图像
        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_ships()

    def prep_score(self):
        #圆整分数
        rounded_score = int(round(self.stats.score, -1))
        score_str = "{:,}".format(rounded_score)
        self.score_image = self.font.render(score_str, True,
                                            self.text_color)  #得到记分榜的surface

        #将得分放在屏幕右上角
        self.score_rect = self.score_image.get_rect()
        self.score_rect.right = self.screen_rect.right - 20
        self.score_rect.top = 20

    def show_score(self):
        '''在屏幕上显示得分'''
        self.screen.blit(self.score_image, self.score_rect)
        self.screen.blit(self.high_score_image, self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)

        #绘制飞船
        self.ships.draw(self.screen)

    def prep_high_score(self):
        '''将最高分转换为渲染的图像'''
        high_score = int(round(self.stats.high_score, -1))
        high_score_str = "High Score:{:,}".format(high_score)
        self.high_score_image = self.font.render(high_score_str, True,
                                                 self.text_color)

        #将最高分放在屏幕右上角
        self.high_score_rect = self.high_score_image.get_rect()
        self.high_score_rect.centerx = self.screen_rect.centerx
        self.high_score_rect.top = self.score_rect.top

    def prep_level(self):
        '''将等级转换为渲染的图像'''
        self.level_image = self.font.render("Level:" + str(self.stats.level),
                                            True, self.text_color)

        #将等级放在得分下方
        self.level_rect = self.level_image.get_rect()
        self.level_rect.right = self.score_rect.right
        self.level_rect.top = self.score_rect.bottom + 10

    def prep_ships(self):
        '''显示还余下多少艘飞船'''
        self.ships = Group()
        for ship_number in range(self.stats.ships_left):
            ship = Ship(self.setting, self.screen, self.path)
            ship.image = pygame.transform.scale(
                ship.image,
                (int(ship.rect.width / 2), int(ship.rect.height / 2)))
            ship.rect.x = 10 + ship_number * ship.rect.width
            ship.rect.y = 10
            self.ships.add(ship)